Prof. Dr. Michael Kleyer

Landscape Ecology Group
Institute of Biology and Environmental Sciences
University of Oldenburg

Carl von Ossietzky Str. 9-11
D-26129 Oldenburg

D-26111 Oldenburg

Tel.: +49-(0)441-798-3278

Secretary's office
Tel.: +49-(0)441-798-3910
Fax: +49-(0)441-798-5659

Julia Stahl

Dr. Julia Stahl



University of Oldenburg
26111 Oldenburg

Room: W2-2-244

Tel. ++ 49 (0)441 798 33 45

Fax ++ 49 (0)441 798 56 59




Vorlesung "Ökologie der Tiere" im MSc Landschaftsökologie, Modul "Ökologie der Pflanzen und Tiere"

WiSe 2010/11

Vorlesung "Ökologie der Tiere" im MSc Landschaftsökologie, Modul "Ökologie der Pflanzen und Tiere"

Seminar und Übung "Statistische Analyse raumabhängiger Daten" im MSc Landschaftsökologie, Modul "Datenmodellierung"

Seminar zur Milieustudie Naturschutz im BSc Umweltwissenschaften

SoSe 2011

Übung "Spatial Ecology" im MSc Landschaftsökologie, Modul "Functional Ecology of communities in heterogeneous landscapes"

Übung und Seminar zur Milieustudie Naturschutz im BSc Umweltwissenschaften

Scientific education and expertise

1990 to 1996

  • study of biology at the Universities of Cologne, D, and Vienna, A

1995 / 1996

  • MSc Project at Animal Ecology Group, University of Groningen, NL; title: ‘Small scale immigration phenomena in wintering flocks of Barnacle Geese (Branta leucopsis)’

1996 – 2001

  • PhD student of the Animal Ecology Group, University of Groningen, NL, (Prof. RH Drent), PhD Thesis: ‘Limits of the co-occurrence of avian herbivores. How geese share scarce resources.’ (field ecological studies on bird migration and the role of herbivores in coastal ecosystems; including behavioral and ecophysiological studies on arctic geese and large herbivores (sheep, cattle, hares))

July / Aug. 2001

  • Post-Doc Dept. of Terrestrial Ecology, Univ. of Wageningen, NL (Dr. H. Olff)

2001 – 2002

  • Ecologist at It Fryske Gea – research on salt-marsh restoration projects in relation to habitat use of waterfowl

2002 – 2004

  • Emmy-Noether Fellow (DFG) at Community and Conservation Ecology Group and Animal Ecology Group, University of Groningen, project title: ‚The role of coastal stepping stones for the migration of Arctic geese.’
Nov. 2004 – July 2006 
  • Post-Doc at Landscape Ecology Group, University of Oldenburg
Aug. 2006 Oct. 2008
  • DFG Post-Doc Research Fellow at Landscape Ecology Group, Oldenburg University, in close co-operation with the Institute of Avian Research, Wilhelmshaven, project: "Flexible migrants in a changing world"

Nov. 2008 present

  • Assistant Professor Functional Community Ecology at Landscape Ecology Group, Oldenburg University


Bakker JP, Rosén E, Bretfeld M, Feldt T & Stahl J (in press) Long-term effects of scrub clearance and litter removal on the re-establishment of dry alvar plant species. Acta Bot. Fenn. in press.

Karagicheva J., Rakhimberdiev, E., Dobrynin D., Saveliev, A., Rozenfeld, S., Pokrovskaya, O., Stahl, J., Prop, J. & Litvin, K. (2011) Individual inter-annual nest-site relocation behaviour drives dynamics of a recently established Barnacle Goose Branta leucopsis colony in sub-arctic Russia. Ibis (2011), doi: 10.1111/j.1474-919X.2011.01123.x [pdf]

Maier, M., Schwienheer, J., Exo, K.M. & Stahl, J. (2011) Vegetation structure of TMAP vegetation types on mainland salt marshes. Wadden Sea Ecosyst. 26: 105-110. [pdf]

Bild Bakker, J.P., Kuijper, D.P.J. & Stahl, J. (2010): Community Ecology and Management of Salt Marshes. pp: 131-148 in: Verhoef, H.A. & Morin, P.J. (eds) Community Ecology. Processes, Models and Applications. Oxford Univ. Press, Oxford. [pdf]

Kruckenberg, H. Kondratyev, A. Mooij, J.H., Loonen, M.J.J.E. Stahl, J. & Zöckler, C (2009): Antiprädationsverhalten von Weißwangengänsen auf Kolguyev und Svalbard. Osnabrücker Naturwiss. Mitt. 35: 201 – 208. [pdf]

Oberdiek, N., Dierschke, J., Schröder, M., Feldt, T. & Stahl, J. (2009): Greifvögel an der Küste in Bedrängnis? Kornweihen Circus cyaneus im Nationalpark "Niedersächsisches Wattenmeer". Vogelwarte 47:362-363.

Schröder M, Oberdiek N, Dierschke J, Feldt T & Stahl J (2010) Die Jagdhabitatwahl von Kornweihen (Circus cyaneus) und Rohrweihen (Circus aeruginosus) auf den Ostfriesischen Inseln. Die Vogelwelt 131: 231-238. [pdf]

Schröder, M., Oberdiek, N., Dierschke, J., Feldt, T. & Stahl, J. (2009): Jagdhabitatwahl von Kornweihen Circus cyaneus und Rohrweihen Circus aeruginosus auf den Ostfriesischen Inseln, Nationalpark "Niedersächsisches Wattenmeer". Vogelwarte 47: 363.

Eichhorn, G., Drent, R.H., Stahl, J., Leito, A., Alerstam, T. (2009): Skipping the Baltic: the emergence of a dichotomy of alternative spring migration strategies in Russian barnacle geese. Journal of Animal Ecology 78:63-72. DOI: 10.1111/j.1365-2656.2008.01485.x [pdf]

van der Jeugd, HP, Eichhorn G; Litvin K; Stahl J; Larsson K; van der Graaf AJ; Drent RH (2009): Keeping up with early springs: rapid range expansion in an avian herbivore incurs a mismatch between reproductive timing and food supply. Global Change Biology 15: 1057–1071, doi: 10.1111/j.1365-2486.2008.01804.x[pdf]

Feige N, Van der Jeugd HP, Voslamber B, Stahl J (2008): Characterisation of Greylag Goose (Anser anser) breeding areas in the Netherlands with special regard to human land use.Vogelwelt 129: 348-359. [pdf]

Feige N, Van der Jeugd HP, Van der Graaf AJ, Larsson K, Leito A, Stahl J (2008): Newly established breeding sites of the Barnacle Goose in north-western Europe - an overview of breeding habitats and colony development. Vogelwelt 129: 244-252. [pdf]

Maier M, Exo K-M & Stahl, J (2008): Nationalpark Wattenmeer als Chance für Wiesenpieper und Rotschenkel? Auswirkungen von Nutzungsänderungen in Salzwiesen auf Wiesenbrüter. Vogelwarte 46:332-333.

Stahl, J. (2008): Auf grüner Welle? Flexible Zugstrategien arktischer Gänse. Vogelwarte 46:283-284.

Drent, RH, Eichhorn, G, Flagstad, A., Van der Graaf, AJ, Litvin, KE & Stahl, J. (2007): Migratory connectivity in Arctic geese: spring stopovers are the weak links in meeting targets for breeding. J. Ornithology DOI 10-1007/s10336-007.0223-4. [pdf]

Van der Graaf AJ, Stahl J, Veen GF, Havinga RM & Drent RH (2007). Patch choice of avian herbivores along a migration trajectory – from Temperate to Arctic. Basic and Applied Ecol. 8:354-363. [pdf]

Van der Graaf AJ, Stahl J, Veeneklaas RM, Bakker JP (2007): Vegetation characteristics of a brackish marsh on Gotland and foraging choices of migrating arctic geese. Ann. Bot. Fenn. 44: 33-41. [pdf]

Drent RH, Fox AD, Stahl J (2006): Travelling to breed. J Ornithology 147: 122-134. [pdf]

Stahl J, Van der Graaf AJ, Drent RH & Bakker JP (2006): Subtle interplay of competition and facilitation among small herbivores in coastal grasslands. Functional Ecology 20:908-915. [pdf]

Van der Graaf AJ, Stahl J, Klimkowska, A., Bakker JP & Drent,RH (2006). Surfing on a green wave - how plant growth drives spring migration in the Barnacle Goose. Ardea 94 567-577. [pdf]

Van der Graaf AJ, Coehoorn P & Stahl J (2006) Sward height and bite size affect the functional response of barnacle geese Branta leucopsis. J. Ornithology 147: 479-484.[pdf]

Bos,D, Drent, RH, Rubinigg,M & Stahl, J (2005): The relative importance of food quantity and quality for patch and habitat choice in Brent Geese. Ardea 93: 5-16. [pdf]

Stahl J. (2005): Geese as small grazers. (Ganzen als kleine grazers). pp. 107-114 in: Mooser R. & Van Loon AJ. (eds) Avifauna van Schiermonnikoog. Unipers, Abcoude. [pdf]

Stahl J & Bos D (2005): The mixed blessings of compulsory group living. Goose flocks impose their own rules. Ch. 34 in: Drent RH, Bakker JP, Tinbergen JM, Piersma T (eds) Seeking Nature’s Limits. KNNV Publishers, Utrecht. [pdf]

Van Eerden MR, Drent RH, Stahl J & Bakker JP (2005): Connecting Seas: western Palearctic continental flyway for water birds in the perspective of changing land use and climate. Global Change Biology 11: 894-908. [pdf]

Van der Graaf AJ, Stahl J & Bakker JP (2005): Compensatory growth of Festuca rubra after grazing – Can barnacle geese increase their own harvest? Functional Ecology 19: 961-969. [pdf]

Van der Graaf AJ, Lavrinenko OV, Elsakov V, Van Eerden ME & Stahl J (2004): Habitat use of breeding barnacle geese in the Kolokolkova Bay, Russia. Polar Biology 27:651-660. [pdf]

Bakker JP, Bos D, Stahl J, de Vries Y, Jensen A. (2003) Biodiversität und Landnutzung in Salzwiesen. Nova Acta Leopoldina 328: 163-194.

Bos D & Stahl J (2003): Creating new foraging opportunities for Dark-bellied Brent Branta bernicla and Barnacle Geese Branta leucopsis in spring - insights from a large-scale experiment Ardea 91: 153-166. [pdf]

Stahl J, Bos D & Loonen MJJE (2002) Foraging along a salinity gradient – the effect of tidal inundation on site choice by Brent and Barnacle Geese. Ardea 90: 201-212. [pdf]

Stahl J. (2001) Limits to the co-occurrence of avian herbivores. How geese share scarce resources. PhD Thesis, Groningen Univ., Niederlande.

Stahl J, Tolsma PH, Loonen MJJE & Drent RH (2001) Subordinates explore but dominants profit: resource competition in high Arctic barnacle goose flocks. Animal Behaviour 61:257-264. [pdf]

Van der Jeugd HP, Olthoff M & Stahl J (2001) Breeding range translates into staging site choice: Baltic and Arctic Barnacle Geese Branta leucopsis use different habitats at a Dutch Wadden Sea island. Ardea 89:253-265.

Stahl J. & Loonen MJJE (1998) Effects of predation risk on site selection of barnacle geese during brood rearing. Norsk Polarinstitutt Skrifter 200: 91-98.






(Changed: 29 Apr 2022)